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Blanking of fibre reinforced plastics. Manufacturing technology and numerical modelling

纤维增强塑料的冲裁。

基本信息

批准号：
286076101
负责人：
Professor Dr.-Ing. Thomas Bergs, since 7/2019
金额：
--
依托单位：
Werkzeugmaschinenlabor - WZL
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/286076101?language=en
关键词：
Blanking fibre reinforced plastics.Manufacturing

项目摘要

Carbon fibre reinforced plastics (CFRP) demonstrate a high strength to density ratio as compared with the conventional construction materials. This material property of CFRP defines a high potential for the manufacturing of the weight-optimized components in the contest of material based lightweight design. It is expected that CFRP components will be used in high-volume production of the automotive industry. The CFRP components are often manufactured near-net-shape. For the further usage of these CFRP components trimming or piercing for the generation of the functional elements is required. One potentially economically efficient manufacturing technology suitable for the high-volume production is blanking. CFRP blanking does not belong to the state of the art so that the cause and effect relationships during the blanking process are not yet researched.The aim of this proposal is the development of an analytical-empirical model by which means principal cause and effect relationships between the material behavior and the resulting workpiece quality in blanking process can be adequately explained. Understanding of the physical mechanisms in the cutting zone lies in in the focus of the study. These mechanisms are essentially determined by the deformation, resulting damage and ultimately failure of the CFRP compound. The acquired understanding of the basic processes enables subsequently the realization of CFRP blanking with a high workpiece quality through the result-oriented process design.The development of the explanation model is realized through the cooperation of IFAM and WZL. IFAM carries out the material characterization as well the formulation and numerical implementation of a microscopically motivated material model that is capable of realistic reproduction of the CFRP separation in blanking process. The WYL is responsible for the systematic experimental investigation of the CFRP blanking and identification of the significant cause and effect relationships between the process parameter and the process results. These insights will be considered during the development of the material model. Furthermore, the WZL carries out a numerical analysis of the CFRP blanking using the material model developed and implemented by IFAM. Finally, the explanation model for the CFRP separation in blanking process will be synthesized from the obtained findings.

与传统建筑材料相比，碳纤维增强塑料 (CFRP) 具有较高的强度密度比。 CFRP 的这种材料特性决定了在基于材料的轻量化设计竞赛中制造重量优化组件的巨大潜力。预计CFRP部件将用于汽车行业的大批量生产。 CFRP 部件通常以近净形状制造。为了进一步使用这些 CFRP 部件，需要进行修整或穿孔以生成功能元件。一种适合大批量生产的潜在经济高效制造技术是冲裁。 CFRP 冲裁不属于现有技术，因此尚未研究冲裁过程中的因果关系。本提案的目的是开发一种分析经验模型，通过该模型可以充分解释冲裁过程中材料行为与工件质量之间的主因和影响关系。了解切削区域的物理机制是研究的重点。这些机制本质上是由 CFRP 复合材料的变形、损坏和最终失效决定的。对基本工艺的了解使得随后能够通过以结果为导向的工艺设计实现高工件质量的CFRP冲裁。解释模型的开发是通过IFAM和WZL的合作实现的。 IFAM 进行材料表征以及微观激励材料模型的制定和数值实施，该模型能够真实再现冲裁过程中的 CFRP 分离。 WYL 负责 CFRP 冲裁的系统实验研究，并识别工艺参数与工艺结果之间的重要因果关系。在材料模型的开发过程中将考虑这些见解。此外，WZL 使用 IFAM 开发和实施的材料模型对 CFRP 冲裁进行数值分析。最后，根据所获得的结果，综合了冲裁过程中 CFRP 分离的解释模型。